，Vibration Screen Noise Control
Vibration screens are widely used in industries such as mining, ore processing, quarrying, construction, paper processing, and energy generation due to their durable, reliable and efficient nature. The machines offer the ability to separate materials by size and shape, as well as various other properties. The vibrational screens also create noise which can disrupt neighbouring properties, work processes and can even cause health issues, resulting in an increasing demand for reliable noise control measures.
Noise pollution from vibrational screens affects surrounding areas, making it necessary for all operations to take ample noise control measures. Here, we provide insight into some of the most common noise control methods.
1. Acoustic Enclosures
Acoustic enclosures are popular noise control and attenuation solutions for vibrational screens. Anechoic or fully-welded steel enclosures are designed to cover the machines; these enclosures can reduce noise levels by up to 30dB (A). The acoustic enclosures are provided with sound-absorbing panels and mineral wool filling, creating a barrier to the generated noise. They are made of a steel shell and acoustic insulation panels to prevent any damage.
2. Vibration Isolation
Vibration isolation is effective in reducing vibrations in vibrational screens and ultimately reducing the noise levels. The isolation materials used should be non-resonant, lightweight and affordable. Vibration isolators are placed on the vibrational machines, which absorb the energy generated by the machine, thus reducing the transmission of noise energy. Vibration isolation also prevents damage that could be caused by the resonant of the machine itself.
3. Acoustic Barriers
Acoustic barriers are most commonly used for outdoor noise control needs. These barriers are designed to reduce the noise from vibrational screens from travelling to the neighbouring area. The barriers can be made with steel, concrete, or a combination of the two. Acoustic barriers are inserted currently with acoustic linings, consisting of mineral wool, gypsum, and foil, to provide further reduction in noise levels.
4. Nozzle Mufflers
Nozzle mufflers are commonly used to decrease the noise from vibrational screens in industrial operations. These types of mufflers can reduce the level of noise by up to 25dB (A). Nozzle mufflers are installed in the air intake or air exhaust of the vibrational machines and rely on the principle of resonant absorption. It works by creating muffled sound (rather than blocked) through the passing of sound waves through the nozzle and the use of acoustic lining.
5. Acoustic Louvers
Acoustic louvers are attached to vibrational screens, allowing the sound waves to pass through unimpeded, even when the machine is running. The acoustic louvers act as a filter for vibrations, sound, and noise. This ensures that the noise generated by the machine is contained, preventing it from spreading. The acoustic louvers are constructed with galvanized steel and acoustic linings, which is an essential feature to reduce the noise generated by the vibrational screens.
Overall, it is essential to use reliable noise control measures when dealing with vibrational screens. If used correctly, these measures will create a more peaceful environment, ensuring the safety of the workers and reducing noise pollution in the area. Moreover, these measures will also help to extend the life of the machines, increase their efficiency, and reduce energy costs.
